Hydraulic valve



(No Model.)

r 2 Sheets-Sheet 2.

E; THAYER.

HYDRAULIG VALVE- Eaten-ted Mar. 20,1883.

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UNITED STATES PATENT OFFICE.

ELI THAYER, OF WORCESTER, MASSACHUSETTS.

HYDRAULIC VALVE.

SPECIFICATION forming part of Letters Patent No. 274,155, dated March 20, 1883.

' Application filed June 28, 1882. (No model.)

To all wltom it may concern! Be it known that I, ELI THAYER,of the city and county of Worcester, and State of Massachusetts, have invented an Improvement in Hydraulic Valves, of which the following is a specification.

My invention has reference to valves for hydraulic elevators; and it consists in the peculiar construction of the various parts, as is set out in the following specification and shown in the accompanying drawings, which form part thereof.

Like letters of reference correspond to similar parts wherever used.

In the drawings, Figure 1 is asectional elevation of my improved hydraulic valve, showing its connection with the elevator, tank, and

pump. Fig. 2 is a plan of same; and Fig. 3 is an elevation ofsame, showing its relation -to the elevator and the means foroperating it.

A is the valve-cylinder, and may be made of cast-iron alone, or cast-iron with a brass lining. It is open at both top and bottom,

and is made slightly bell-mouthed-one or both E and H prevent anymaterial escape of water from the cylinder through its ends, and the valves 13 and G control the passage of water from the pump to the elevator, or the water from the elevator to the tank, and from the arrangement, as shown in Fig. 1 the valves are perfectly balanced, as the pressure of the water from .pump, tank, or elevator presses equally on two opposing valve-faces.

The valve-rod is made of a central rod, I, provided on the top with a head, I, of the usual construction, upon which is placed a tube, J, resting against'said head I, then the valve E, then a packing-washer of any suit- 6 able material, 2', then another section of. tube J, then another packing-washer i, then valve F, then another washing-packer 4 then a sec tion of tube J, then a washer v3, then valve G, then a washer t, then tube J, then a washer t', then valve H, and finally nuts 6.

The valves may be made in any manner desired; but I prefer the leather packing O O, clamped together by plates P P, as shown. Thepacking-washers i prevent all possibility of water leaking through: the tubes J.

In valves of this class as heretofore made, the cylinder was provided with heads and stuffing-box, and the valve-rod was turned with shoulders for the support of the valves, and the entire rod was drilled to allow water to pass from one end of the cylinder to the other when the valves were moved, said water finding its way around the valves next to the heads. By my construction any waterwhich escapes around valves E and H can run oil, and produces no injurious effects, and I am enabled to use a valve-rod, as shown, and

which is both simple and cheap in construction. By this change in the valve-rod, valves,

and heads, I am able to reduce the cost of 75 the clamp K or a pivoted link, K, as shown in Fig. 3, which construction I prefer. The ends of the lever are connected by ropes or rods 91. n with a similar lover, N, pivoted at K to the top of the elevator. provided at top and bottom with stops 01*, which are struck by the platform of the ele; vator to shut the valves and arrest the movement of said platform. The clamp K allows of the lever N being placed in any desired po- 5 sition to suit the building or machinery. This cannot be done when heads are used with the cylinder, as the head at top carries a stud, to which the valve-lever N is pivoted, and the' changes of position are limited by the bolt- I00 holes.

The operation is as follows: The elevator The rope n is being down and valve in position shown, by pulling down the rope n the valve-rod is raised and water admitted from the pump to the elevator. Asthe cage ascends the platform, when it reaches the top, strikes the stop a and raises the rope a, lowering the valve-rod and bringing the valves to the position shown. Now the elevator is at rest. To descend, the rope n is raised, depressing the valve-rod and valves, allowing the water to flow from the elevator to the tank. When the platform reaches the bottom and strikes the stop a the valve-rod and valves are raised again to the position shown, and the elevator is once more at rest.

In elevators of this class the water in the tank is used over and over again; but instead of pumping from the tank the pump may draw its water from a main, and may be provided with automatic mechanism for stopping and starting it.

In this application I have simply shown the relation of the elevator, tank, and pump to the three annular chambers, so as to explain the operation of the valve more clearly.

The two outer plates, P, are made to fit the cylinder A and guide the valves and valve-rod, in lieu of the caps and stuffing-box formerly used.

In place of the pump, any other means to create a force to the watermay be used;

Having now described my invention, whatl claim as new, and desire to secure by Letters Patent, is-

1. A balanced valve for hydraulic purposes, which consists of a cylinder open at both ends, and provided with three annular chambers opening into said cylinder and respectively connected with a tank, elevator, and pump, in combination with a valve-rod provided with four valves, substantially as shown.

2. A balanced valve for hydraulic purposes, which consists of a cylinder open at both ends, one of which is bell-mouthed or flaring and provided with three annular chambers opening into said cylinder, in combination with a valverod provided with four valves, substantially as shown.

3. The valve-rod and valves for a hydraulic valve, which consists of central rod, I, tubes J,-packing-washers t, and valves E F G H, substantially as shown.

4.. A balanced valve for hydraulic purposes, which consists of a cylinder open at both ends, and provided with three annular chambers opening into said cylinder, in combination with rod I, tubes J, washers t, and valves E, F, G, and H, substantially as and for the purpose specified.

5. In a hydraulic valve, the cylinder A, open at the top, in combination with clamp K, lever N, supported by said clamp, and means actuated by the elevator to move said lever to close the valve, substantially as and for the purpose specified.

6. In a hydraulic valve, the cylinder A, in combination with clamp K, link K, lever N, valve-rod, ropes a it, stops a, lever N, and elevator-platform R, substantially as and for the purpose specified.

7. The combination, with cylinder A, open at the top, of clamp K, link K, lever N, and valve-rod, substantially as and for the purpose specified.

8. In a balanced valve, the combination, with the cylinder A, open at the top and bottom, with a series of valves arranged upon a valverod and sliding therein, and plates P, to guide said valves and valve-rod in said cylinder in lieu of the caps and stuffing-box formerly used, and one or more apertures opening into said cylinder and between every two valves, substantially as and for the purpose specified.

In testimony of which invention I hereunto set my hand.

ELI THAYER.

Witnesses:

RS. CHILD, Jr., 1%. M. HUNTER. 

